I have an international SIM card that when I originally put it in my unlocked phone it said T-Mobile. (It isn't T-Mobile but appears to run on their network is my guess) I went ahead and got an actual T-Mobile SIM so that I could download the OS and Service Books from T-Mobile. Now that it is all done, I put the international SIM back into the phone and it now registers wtih ATT at the top! Any ideas on how to get it back to saying T-mobile? The APN still registers as T-Mobile.